Crasher,
The faired mirror pods would have been separate units that would have been pop-riveted onto the bodywork - if they were removed, then the holes would have been filled (probably a spot of mig-weld) and filed down and the panel repainted so that the morrors on stalks could have been attached.
It can be difficult modelling a specific car over its racing life as there can be so many changes - look at the GT-40's for example - any particular chassis may have gotten a different engine, wheels, bodywork, nose, lights.........whatever.
Post some pictures of the car when you're done....I'd like to see it.
Cheers,
LeeTree